摘要
为实现高可靠、长寿命产品的可靠性评估,提出了步进加速退化试验的新方法.首先给出了步进加速退化试验方法及其基本假设,然后探讨了步进退化数据向恒加退化数据的折算方法,在此基础上提出了基于伪失效寿命的步进加速退化可靠性评估算法和基于随机退化轨迹的步进加速退化可靠性评估算法,最后利用试验数据对该方法进行了验证.结果表明:与恒加退化试验相比,该方法可以极大地缩短试验时间和减少试验样本,因此,具有更高的效费比.
In order to evaluate the reliability of equipment with high reliability and long life quickly, the method of step-up-stress accelerated degradation testing was presented. First, step-up-stress accelerated degradation testing method and the basic assumptions were given, then data conversion method from step up stress degradation data to constant stress degradation data was expatiated; based on these, step up stress accelerated degradation reliability assessment arithmetic based on pseud failure lifetime and random degradation path were proposed; a numerical example was given to illustrate the method in the end. Compared with constant degradation testing, step-up-stress accelerated degradation testing can decrease testing time and reduce sample number hugely, so it has higher ratio of cost efficiency.
出处
《系统工程理论与实践》
EI
CSSCI
CSCD
北大核心
2010年第7期1279-1285,共7页
Systems Engineering-Theory & Practice
基金
国家自然科学基金(60472009)
关键词
步进加速退化试验
伪失效寿命
随机退化轨迹
可靠性评估
step-up-stress accelerated degradation testing （SUSADT）
pseud failure lifetime
random degradation path
reliability assessment
